Arcadia Biosciences, Inc. (RKDA)
RKDA moved a median of -1.05% 30 minutes after news, and -0.51% by the close. How RKDA actually reacts to news — the realized, point-in-time move the market made, measured across 139 labeled events over the last three years with zero look-ahead.
RKDA’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 25% | 97 |
| 30-min | -1.05% | 34% | 115 |
| 60-min | -1.34% | 39% | 122 |
| to close | -0.51% | 45% | 138 |
| Middle 50% of RKDA reactions | -3.29% to +0.39% |
|---|---|
| Median reaction (30-min) | -1.05% |
| Measured reactions | 139 |
Half of all Arcadia Biosciences, Inc. news events land between -3.29% and +0.39% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when RKDA moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to RKDA's baseline. Nothing else.
Recent RKDA events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form S-8 Arcadia Biosciences, | SEC filing · Form S-8 | SEC EDGAR | -0.02% | +5.18% | |
| Form 8-K Arcadia Biosciences, For: Sep 10 | SEC filing · Form 8-K | SEC EDGAR | — | +0.21% | |
| Form 8-K Arcadia Biosciences, For: Aug 31 | SEC filing · Form 8-K | SEC EDGAR | -0.23% | +0.04% | |
| Arcadia Biosciences (RKDA) Announces Second Quarter and First Half 2026 Financial Results and Business Highlights | Press release | GlobeNewswire | -1.94% | +7.45% | |
| Form 10-Q Arcadia Biosciences, For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -1.94% | +7.45% | |
| Form 8-K Arcadia Biosciences, For: Aug 13 | SEC filing · Form 8-K | SEC EDGAR | -1.94% | +7.45% | |
| Form 8-K Arcadia Biosciences, For: Aug 04 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form PRE 14A Arcadia Biosciences, For: Dec 31 | SEC filing · Form PRE | SEC EDGAR | +0.00% | +1.49% | |
| Form EFFECT Arcadia Biosciences, | SEC filing · Form EFFECT | SEC EDGAR | +0.00% | +0.82% | |
| Form 8-K Arcadia Biosciences, For: Jul 01 | SEC filing · Form 8-K | SEC EDGAR | +8.93% | -3.60% | |
| Form D Arcadia Biosciences, | SEC filing · Form D | SEC EDGAR | +0.00% | +4.20% | |
| Form S-3 Arcadia Biosciences, | SEC filing · Form S-3 | SEC EDGAR | +0.00% | +4.20% | |
| Form 8-K Arcadia Biosciences, For: Jun 11 | SEC filing · Form 8-K | SEC EDGAR | +0.99% | -9.08% | |
| Arcadia Biosciences (RKDA) Announces Closing of $4 Million Private Placement Priced At-The-Market Under Nasdaq Rules | Press release | GlobeNewswire | -5.66% | -13.37% | |
| Arcadia Biosciences (RKDA) Announces $4 Million Private Placement Priced At-The-Market Under Nasdaq Rules | Press release | GlobeNewswire | +6.42% | +5.10% | |
| Arcadia Biosciences (RKDA) Announces First Quarter 2026 Financial Results and Business Highlights | Press release | GlobeNewswire | -3.85% | -8.12% | |
| Form 10-Q Arcadia Biosciences, For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | -3.85% | -8.12% | |
| Form 8-K Arcadia Biosciences, For: May 14 | SEC filing · Form 8-K | SEC EDGAR | -3.85% | -8.12% | |
| Form 10-K/A Arcadia Biosciences, For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -4.44% | -3.45% | |
| Form 8-K Arcadia Biosciences, For: Mar 30 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -8.45% | |
| Arcadia Biosciences (RKDA) Announces Fourth-Quarter and Full-Year 2025 Financial Results and Business Highlights | Press release | GlobeNewswire | — | -2.65% | |
| Form 10-K Arcadia Biosciences, For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | — | -2.65% | |
| Form 8-K Arcadia Biosciences, For: Mar 26 | SEC filing · Form 8-K | SEC EDGAR | — | -2.65% | |
| Form EFFECT Arcadia Biosciences, | SEC filing · Form EFFECT | SEC EDGAR | — | -5.50% | |
| Form 8-K Arcadia Biosciences, For: Feb 04 | SEC filing · Form 8-K | SEC EDGAR | +0.55% | +0.55% | |
| Form S-3 Arcadia Biosciences, | SEC filing · Form S-3 | SEC EDGAR | +0.00% | -0.91% | |
| Form D Arcadia Biosciences, | SEC filing · Form D | SEC EDGAR | — | -2.19% | |
| Form RW Arcadia Biosciences, | SEC filing · Form RW | SEC EDGAR | -3.00% | -1.29% | |
| Form 8-K Arcadia Biosciences, For: Jan 09 | SEC filing · Form 8-K | SEC EDGAR | -1.61% | -9.24% | |
| Arcadia Biosciences (RKDA) Announces Exercise of Preferred Investment Options for $2.1 Million Gross Proceeds | Press release | GlobeNewswire | +2.08% | -8.30% | |
| Form 8-K Arcadia Biosciences, For: Dec 24 | SEC filing · Form 8-K | SEC EDGAR | +5.26% | -12.92% | |
| Arcadia Biosciences (RKDA) Receives Termination Notice of the Proposed Business Combination with Roosevelt Resources | Press release | GlobeNewswire | -1.64% | -14.75% | |
| Form 8-K Arcadia Biosciences, For: Dec 19 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -2.25% | |
| Form ARS Arcadia Biosciences, For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | -2.19% | -0.55% | |
| Form DEF 14A Arcadia Biosciences, For: Dec 19 | SEC filing · Form DEF | SEC EDGAR | -2.19% | -0.55% | |
| Arcadia Biosciences (RKDA) Announces Third Quarter 2025 Financial Results and Business Highlights | Press release | GlobeNewswire | +0.00% | +0.56% | |
| Form 10-Q Arcadia Biosciences, For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +0.56% | |
| Form 8-K Arcadia Biosciences, For: Nov 07 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.56% | |
| Form 8-K Arcadia Biosciences, For: Oct 22 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.97% | |
| Arcadia Biosciences (RKDA) Announces Second Quarter and First Half 2025 Financial Results and Business Highlights | Press release | GlobeNewswire | — | +5.68% | |
| Form 10-Q Arcadia Biosciences, For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | — | +5.68% | |
| Form 8-K Arcadia Biosciences, For: Aug 14 | SEC filing · Form 8-K | SEC EDGAR | — | +5.68% | |
| Form S-4/A Arcadia Biosciences, | SEC filing · Form S-4 | SEC EDGAR | +0.00% | +1.90% | |
| Form 8-K Arcadia Biosciences, For: May 14 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +2.22% | |
| Arcadia Biosciences (RKDA) Announces First Quarter 2025 Financial Results and Business Highlights | Press release | GlobeNewswire | +0.00% | -9.49% | |
| Form 10-Q Arcadia Biosciences, For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -9.49% | |
| Form 8-K Arcadia Biosciences, For: May 08 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -9.49% | |
| Form 8-K Arcadia Biosciences, For: Apr 30 | SEC filing · Form 8-K | SEC EDGAR | +12.94% | +14.50% | |
| Form 10-K/A Arcadia Biosciences, For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -4.44% | +2.87% | |
| Arcadia Biosciences (RKDA) Announces Date of First Quarter 2025 Financial Results and Business Highlights Conference Call | Press release | GlobeNewswire | — | -3.76% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the RKDA section they belong to.
Where else RKDA is measured.
RKDA earnings → · Analyst actions → · SEC filings →
Other Basic Materials names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| ALUMINA LTD S/ADR (AWCMY) | 140 | 0.00% | 41% |
| ASAHI KAISEI CRP UNSP/ADR (AHKSY) | 139 | 0.00% | 44% |
| Dynacor Gold Mines Inc (DNG_TSE) | 138 | 0.00% | 27% |
| Eagle Plains Resources (EPL_CDNX) | 137 | 0.00% | 6% |
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How the numbers are made.
How is Arcadia Biosciences, Inc.'s median reaction calculated?
Every labeled RKDA news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 139 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 34% of RKDA's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does RKDA's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.